Have you not seen how Allah sends down water from the sky and threaded it as springs in the earth? Then, He brings forth plants of various colors, after which they wither, and you see them turning yellow, and then He makes them into broken stubble. Surely, in this there is a reminder for those of understanding. (21)

Is he whose chest Allah has expanded to Islam, so that he walks upon a light from his Lord (as those whose heart is sealed)? But woe to those whose hearts are hardened against the Remembrance of Allah! Those are in clear error. (22)

Allah has sent down the best discourse, a Book, consimilar in its oftrepeated (verses) that the skins of those who fear their Lord tremble; and thereafter their skins and hearts soften to the Remembrance of Allah. Such is the Guidance of Allah, whereby He guides whosoever He will; and whosoever Allah leads astray, he has no guide. (23)

Is he whose face is cautious of the evil of the punishment on the Day of Resurrection (to be compared to the unbeliever)! To the evildoers it shall be said: 'Now taste that which you have been earning. ' (24)